A high school principal wants to know the proportion of students that favor reducing the amount of time spent in a study hall class.The principal decides to enumerate the entire student body at the high school, then uses a random number generator to choose 100 students to participate in a poll.This type of sampling is known as

A.

systematic random sampling.

B.

stratified random sampling.

C.

simple random sampling.

D.

voluntary response.

E.

cluster sampling.